About a month ago I had the rear rotors and pads replaced by the local BMW dealer. For the second time since that happened, I have pulled into my parkade at work to find the left rear wheel too hot to touch, with the sick smell of burning brake pad in the air. And what's more, I've noticed the car is dragging, noticable going downhill.

The last time I brought it in, they said they couldn't find anything...they suggested that I was driving around with my parking brake on...sorry...I'm not that stupid, plus the other side was fine.

What would cause 1 side to drag in the rear?...Bubble in the system?...